Pump valve



E. E. GREVE PUMP VALVE Filed April 11, 1929 flvfi 5 0 2 J fl a Z I I 9 a 1 w a 4 5 1 z 6070? y R O T N E V w ployed for p Patented Dec. 11 1934 PUMP VALVE Edgar E. Greve,

assignments,

Bellevue, Pa., assignor, by mesne to Oil Well Supply Company,

Pittsburgh, Pa., a corporation of New Jersey Application April 11, 1929, Serial No. 354,293

5 Claims.

the water cylinders of pumps particularly designed for use in the oil and gas fields and emare, to provide in a improved valve seat umping mud-ladened water. Among the objects of the present invention valve assembly a new and construction having metallic and compressible valve contacting surfaces arranged for co-operation with the valve proper; to provide a highly eflicient seal when the valve is closed; to provide a construction embodying a valve seat having a compressible packing element arranged to be acted on by the fluid pressure in the valve chamber of the valve assembly to force said element into close contact with the valve when the latter is on its seat; and to provide, in an assembly of the character mentioned, a construction having large contacting surfaces for the valve proper and its seat including metal to metaljcontacting surfaces and a packing element contact surface.

In the accompanying trates an application drawing, which illusof my invention:

Fig. 1- is a vertical sectional view of a valve assembly embodying the seating surfaces my invention; and

particularly showing of the in said seat for introducing fluid thereto.

In the drawing, 1

have shown the valve assembly embodying my invention in connection with wall portions 5,

structure having a valve 6 and '7 of a water cylinder chamber 8 therein. As

illustrated, each of the walls 5 and 6 are formed with an opening, the opening of the lower wall 5 being adapted to the opening of wall a depending portion receive a valve seat 9, and 6 being adapted to receive of a closure cap 10, the

latter being removably attached to the cylinder casing by bolts andnuts as at 11.

The valve seat 9 constitutes an important and characteristic feature of the present invention and, as illustrated and as preferred, it is annular in form, wall slightly tapered with the major portion of its outer .It is formed with an enlarged seating portion 12 at one end, which is provided with an annular recess or groove 13, in which is positioned a packing element 14. This element 14 may be of material such as is adapted to the purpose for which the pump is to be used, and in certain instances may be yieldable or compressible; and is intended to be pressed into sealing engagement with the v alve proper when the latter valve seat and ports is seated. Recess 13 extends from the valve contacting face of the valve seat inwardly, parallel to the axis of the recess. It is slightly reduced as shown at b, thus providing shoulders upon which the packing element rests. In addition to the recess 13, the valve seat is provided with ports 15 leading from the reduced portion b and in communication with the valve chamber 8.

Forming the recess in the enlarged portion 12 of the seat, as described, provides metallic contact surfaces 0 and d on opposed sides of the recess and on opposite sides of the packing element, thus providing metal to metal contact faces or surfaces which are spaced laterally and a compressible packing contact face or surface for the valve proper intermediate the laterally spaced metal to metal contacts. The general direction of flow of the fluid through the cylindrical valve seat member 9 is parallel but opposite to the direction of seating movement of the valve proper; and the term laterally as employed in the specification and claims is to be understood as being relative thereto.

The valve proper, designated generally by the numeral 16, comprises an annular portion 17 having an enlarged inclined contacting face 18 for co-operation with the relatively wide and inclined valve contacting face or faces of the valve seat. The portion 1'7 is provided with depending guide members 19 and with an upwardly extending portion 20, the latter being entered in a guide sleeve 21 carried by the cap 10 in a chamber 22 thereof. Sleeve 21 is flanged at 23 and is retained in the cap by a ring 24 and bolts 25. 26 designates a spring disposed in the cap chamber which bears upon the upper end of portion or member 20 of the valve, tending to force the valve to closed position.

It will be noted that the packing element is arranged in a recess which communicates with the valve chamber so that the fluid pressure in the valve chamber will be transmitted to the recess to act on the packing element; and when the valve is seated or in its closed position, the packing element will be forced by the fluid pressure into sealing contact with the valve.

I claim: 4

1. In a pump valve assembly, a cylindrical valve seat member having at one end an enlarged end portion, said enlargedend portion affording an end seating face with a packing element receiving recess, said seat member being provided with a passage entering said recess at its bottom for conducting pressure fluid to the recess.

25 In a pump valve assembly, an annular valve seat member having at one end an enlarged end portion provided with an end seating face, and a recess in said seating face, said member being provided with a port in the enlarged portion communicating with the lower face of said recess, and a packing element disposed in the recess.

3. A pump valve assembly comprising a conical valve seat having a valve seat face and a circular groove therein, said groove having a wall at an.

acute angle to the valve seat face and having an opening from the bottom of said groove, and, a circular gasket in said groove having its lower' k member, and the lower surface of said packing surface at an acute angle to said wall.

4. A pump valve assembly comprising an upwardly facing closure surface, a'circular groove ,set downwardly in said surface and a flexible gas= ket in said groove, the lower surface of said gasket being inclined at an acute angle to a side wall of said groove, said groove having openings to, the outside of said assembly.

:5. In a valve pump assembly, a valve chamber, an annular seat member, a valve member movable to and from seating position thereon, and packing'means disposed in an annular recess in one of said members, said recess having side walls "extending axially of said recess'and intersecting the surface of said member, said recess communicatinglby a passage through said member with the valve chamber to admit fluid to effect a tight seal between said packing means andthe other 

